Determine the missing parts of a polygon and find the perimeter

The video tutorial guides students through finding scale factors and perimeters of polygons. It begins with setting up ratios for proportional sides, solving for unknown side lengths using cross-multiplication, and concludes with calculating the perimeters of the polygons. The teacher emphasizes understanding proportional relationships and applying them to solve geometric problems.

Explain the process of cross-multiplying to solve for a missing side length.

What are the final perimeter values calculated for both polygons?